Evonik Operations Gmbh

Evonik Goldschmidt Corporation

Claudia Hierath

Hans Henning Wenk

Monica Desiree Van Logchem

Ursula Maczkiewitz

Andreas Seifert

Annika Schrader

Marrit Friederike Eckstein

Sunay Karacocuk

Wilfried Knott

Oliver Thum

Klaus-Dieter Klein

Dagmar Windbiel

The invention provides a process for preparing sphingolipids, compositions comprising sphingolipids and further components, and for the use of the compositions.

Process for preparing sphingolipids

The invention provides linear polydimethylsiloxane-polyoxyalkylene block copolymers containing Si&#x2014;C groups and carboxylic ester groups and having repeating (ABAB) units where Aand Aare two different polydimethylsiloxane units of the general formula (I) with a number of Si atoms N=(n+2) of 15&#x2266;N&#x2266;30 and N&#x2260;Nand B is a unit of the formula (II) &#x2014;CH&#x2014;CH&#x2014;(CH)&#x2014;CO[O&#x2014;CH&#x2014;CH(R)]&#x2014;O-[D-O]&#x2014;[&#x2014;CH&#x2014;CH(R)&#x2014;O]&#x2014;OC&#x2014;(CH)&#x2014;CH&#x2014;CH&#x2014; (II) where R independently at each occurrence is H, &#x2014;CHor &#x2014;CH, a and b independently of one another are 0 to 20, c and d independently of one another are values&#x2267;1, e is 0 or 1 and D is a hydrocarbon radical having 2 to 10 C atoms, the overall molar weight of the unit of the formula II being from 600 to 10 000 g/mol, with the proviso that the average mixed molar weight of the polydimethylsiloxane units (A+A) is from &#x3e;1665 to &#x3c;1998 g/mol and the fraction of [O&#x2014;CH&#x2014;CH(R)] with R&#x2550;H is &#x3e;0% to &#x2266;50% by weight, based on the overall weight of [O&#x2014;CH&#x2014;CH(R)] in B, a process for preparing them and their use.

Linear polydimethylsiloxane-polyoxyalkylene block copolymers linked via Si-C groups and via carboxylic ester groups, a process for preparing them and their use

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Essen, Germany

Claudia Hierath